| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.hdfs.server.namenode.snapshot; |
| |
| import org.apache.hadoop.hdfs.server.namenode.INode; |
| import org.apache.hadoop.hdfs.server.namenode.INode.BlocksMapUpdateInfo; |
| import org.apache.hadoop.hdfs.server.namenode.INodeFile; |
| import org.apache.hadoop.hdfs.server.namenode.INodeFileAttributes; |
| import org.apache.hadoop.hdfs.server.namenode.Quota; |
| |
| import java.util.List; |
| |
| /** |
| * The difference of an {@link INodeFile} between two snapshots. |
| */ |
| public class FileDiff extends |
| AbstractINodeDiff<INodeFile, INodeFileAttributes, FileDiff> { |
| |
| /** The file size at snapshot creation time. */ |
| private final long fileSize; |
| |
| FileDiff(int snapshotId, INodeFile file) { |
| super(snapshotId, null, null); |
| fileSize = file.computeFileSize(); |
| } |
| |
| /** Constructor used by FSImage loading */ |
| FileDiff(int snapshotId, INodeFileAttributes snapshotINode, |
| FileDiff posteriorDiff, long fileSize) { |
| super(snapshotId, snapshotINode, posteriorDiff); |
| this.fileSize = fileSize; |
| } |
| |
| /** @return the file size in the snapshot. */ |
| public long getFileSize() { |
| return fileSize; |
| } |
| |
| @Override |
| Quota.Counts combinePosteriorAndCollectBlocks(INodeFile currentINode, |
| FileDiff posterior, BlocksMapUpdateInfo collectedBlocks, |
| final List<INode> removedINodes) { |
| return currentINode.getFileWithSnapshotFeature() |
| .updateQuotaAndCollectBlocks(currentINode, posterior, collectedBlocks, |
| removedINodes); |
| } |
| |
| @Override |
| public String toString() { |
| return super.toString() + " fileSize=" + fileSize + ", rep=" |
| + (snapshotINode == null? "?": snapshotINode.getFileReplication()); |
| } |
| |
| @Override |
| Quota.Counts destroyDiffAndCollectBlocks(INodeFile currentINode, |
| BlocksMapUpdateInfo collectedBlocks, final List<INode> removedINodes) { |
| return currentINode.getFileWithSnapshotFeature() |
| .updateQuotaAndCollectBlocks(currentINode, this, collectedBlocks, |
| removedINodes); |
| } |
| } |